...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Acoustics >Repeatability of spatial measures using figure-of-eight microphones
【24h】

Repeatability of spatial measures using figure-of-eight microphones

机译：使用八字形麦克风进行空间测量的可重复性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The purpose of this study was to evaluate the measurement deviations of the spatial measures lateral energy fraction (LF) and late lateral energy level (GLL), obtained using figure-of-eight microphones. The following factors that may contribute to measurement deviations were evaluated: (1) microphone orientation, (2) spacing between figure-of-eight and omni-directional microphones, which varied from 64 to 152 mm, and (3) differences between individual microphones. Impulse response measurements were taken in a 100-seat lecture hall at four receiver positions using a total of eight figure-of-eight microphones. The average differences due to microphone orientation and spacing, were found to be relatively small: 0.20 ± 0.18 dB (4.3 ± 3.8%) for GLL and 0.02 ± 0.02 (2.0 + 2.4 JNDs) for LF. (The just noticeable difference (JND) of LF has been established at 5%, however the GLLJND has not yet been established.) The largest differences were found when comparing the results between the individual microphones with differences on the order of 0.92 ± 0.73 dB (16 ± 13%) for GLL and 0.022 ± 0.018 (2.6 ± 1.9 JNDs) for LF. These larger differences are likely due to the variations in microphone sensitivity. Based on the measurement conditions used in this case study, it is possible to compare GLL and LF measurements with a given fig-ure-8 microphone in order to evaluate relative differences, since the measurement deviations for a given microphone were found to be relatively low. However, it is difficult to compare the results of data obtained using different figure-8 microphones due to the measurement deviations of the microphones.
机译：这项研究的目的是评估使用八字形麦克风获得的空间测量横向能量分数（LF）和后期横向能量水平（GLL）的测量偏差。评估了可能导致测量偏差的以下因素：（1）麦克风的方向；（2）八字形麦克风和全向麦克风之间的间距（从64到152 mm不等）；以及（3）各个麦克风之间的差异。脉冲响应测量是在总共100个座位的演讲厅中的四个接收器位置进行的，总共使用了八个八字形麦克风。发现由于麦克风方向和间距而引起的平均差异相对较小：GLL为0.20±0.18 dB（4.3±3.8％），LF为0.02±0.02（2.0 + 2.4 JND）。 （LF的明显差异（JND）已确定为5％，但GLLJND尚未确定。）比较各个麦克风之间的结果时发现的最大差异为0.92±0.73 dB量级（对于GLL为（16±13％），对于LF为0.022±0.018（2.6±1.9 JND）。这些较大的差异可能是由于麦克风灵敏度的差异所致。根据此案例研究中使用的测量条件，可以将给定的Fig-ure-8麦克风与GLL和LF测量进行比较，以评估相对差异，因为发现给定麦克风的测量偏差相对较低。但是，由于麦克风的测量偏差，很难比较使用不同的Figure-8麦克风获得的数据结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号